Mechanism of action of digitalis in atrial fibrillation is:

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#1

Mechanism of action of digitalis in atrial fibrillation is:

    1. By decreasing cardiac contractility
    1. Na+ K+ ATPase inhibition
    1. Increase in refractoriness of AV nodal tissue
    1. By causing bradycardia

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ANS:

Digitalis acts in CHF by inhibiting Na+ - K+ ATPase whereas in AF, it acts by decreasing the conduction through AV node.